A Quantitative Investigation of a Peristaltic Model for Phloem Translocation |
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Authors: | AIKMAN D P; ANDERSON W P |
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Institution: | *School of Biological Sciences, University of East Anglia Norwich
Department of Botany, University of Liverpool Liverpool 3 |
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Abstract: | An analysis is made of a peristaltic model of phloem translocationIt is postulated that the periodic action of contractile orbending organelles drive a longitudinal flow of solution withintubules which connect sieve pores in successive sieve plates Plausible values are assumed for the velocity of propagationof the contraction wave, the frequency, the amplitude, and theviscosity of the solution and its concentration. Using relationswhich describe peristaltic flow, predictions are made for thevalues of parameters such as the velocity of solution, the drivingpressure, and rate of energy dissipation. These predicted valuesare seen to be reasonable when compared with the known propertiesof other biological contractile systems. Thus the model is quantitativelyacceptable. |
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